Hmwk Q 8.31

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April P 1C
Posts: 38
Joined: Thu Jan 12, 2017 3:01 am

Hmwk Q 8.31

Postby April P 1C » Wed Jan 24, 2018 5:39 pm

For 8.31 "Calculate the heat released by 5.025 g of Kr(g) at 0.400atm as it cools from 97.6C to 25.0C at
(a) constant pressure and
(b) constant volume.
Assume that krypton behaves as an ideal gas. "

q=nCpdeltaT
Is there a table I need in the textbook that I should use to look up Cp?

Tim Foster 2A
Posts: 73
Joined: Fri Sep 29, 2017 7:07 am

Re: Hmwk Q 8.31

Postby Tim Foster 2A » Wed Jan 24, 2018 5:45 pm

Page 281 in the textbook tells us that
C=3/2RT for monatomic gases at constant volume, while C=5/2RT for monatomic gases at constant pressure.

Sophie 1I
Posts: 51
Joined: Fri Sep 29, 2017 7:04 am

Re: Hmwk Q 8.31

Postby Sophie 1I » Thu Jan 25, 2018 9:51 pm

It's given that C at constant Pressure equals=5/2R the C at constant volume is given to be 3/2R
R is a given constant that equals R = 8.314 J·K-1·mol-1


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